Door closer mechanism door closer price

Door closers are mainly used in commercial and public buildings, but they are also used at home. They have many uses, of which the main purpose is to close the doors themselves to limit the spread of fire and ventilation in buildings. Today Xiao Bian took everyone to understand the working principle of the door closer and introduced the price of several door closers.

First, the principle of door closer

The working principle of the door closer is that when the door is opened, the door body drives the connecting rod and rotates the transmission gear to drive the rack plunger to move to the right. The spring is compressed during the movement of the plunger to the right and the hydraulic oil in the right chamber is also pressurized. The one-way valve ball on the left side of the plunger opens under the effect of oil pressure, and the hydraulic oil in the right cavity flows through the one-way valve to the left cavity. When the door opening process is completed, since the spring is compressed during the opening process, the accumulated elastic potential energy is released, the plunger is pushed to the left, and the transmission gear and the door closer link are rotated to close the door.

During the spring release process, since the hydraulic oil in the left chamber of the door closer is compressed and the check valve is closed, the hydraulic oil can only flow out through the gap between the housing and the plunger and pass through the small hole in the plunger and 2 The flow path with the throttle body is returned to the right chamber. Therefore, the hydraulic oil constitutes a resistance to the release of the spring, that is, through the throttling to achieve the buffering effect, the speed of closing the door is controlled. The throttle valve on the valve body can be adjusted to control the variable door closing speed in different stroke sections. Although there are differences in the structure and size of the door closers produced by different manufacturers, the principle is the same.

Second, the special function of the door closer

With the above knowledge, you can communicate this to your friends, but the secret of the door closer is more than this. In addition to the basic function of automatic door closing, different door closers have different adjustment options and special Features:

1. The speed of closing is adjustable

The trajectory of the door leaf closing is a 90 degree arc, and the area where the door closing speed can be adjusted is generally within the range of 10 degrees to 90 degrees.

2, delay function

The delay feature does not automatically close the door closer. For example, when you push a wheelbarrow or heavy object through the door leaf, the door body can be delayed for a few seconds before returning to the normal closing speed, which is more convenient for people to pass, compared to the normal closing time of most doors of 5-10 seconds. The door closer can be adjusted up to a delay of two minutes or more.

3, adjustable locking speed

The door you see is in the final 0-10 degree zone. The speed at which the door closes in this area is called the lock speed. The door closer with adjustable locking speed has a locking speed regulating valve. By adjusting the valve, it allows you to adjust the closing speed to ensure that any bolt can enter the locking plate and complete the locking action.

4, stop the door function

It seems that there is a contradiction with the door closer requiring automatic closing. However, the use of this feature may be useful in some situations, such as requiring the door to stay open at a certain moment in the loading area. We usually use the door stop block on the door closer arm. When we set the door stop angle, the door leaf will open to a certain angle and it will stop. When the manpower exceeds this angle, the door will return to the automatic closing state. . However, please note that door closers with a door stop function are forbidden on fire doors!

5, open the buffer function

Advanced door closers usually have an open-door cushioning function so that when the door opening force is too large, it will not hit the adjacent wall because the door opening speed is too fast.

Third, the door closer price

1. Ken Lang fireproof door closer B804

Price: 162 yuan

2. Pepsi Hidden Door Hidden Door Closer

Price |: 188 yuan

3、vexg/GMT series door closers

Price: 90 yuan

After reading the introduction of Xiao Bian, did everyone understand more about the principle of the door closer? I hope this article can help everyone.

Door price

Plastic Blind Ditch, main effect is Ooze water in soil. To reduce the pressure of groundwater, eliminate redundant water, protection building won't demage because of Seepage deformation. Widely used in Underground drainage engineering of civil, transportation, water conservancy, civil miners and environmental protection project Underground drainage engineering

 

Product features:

plastic blind ditch is made from many Root modified plastics silk which have same toughness. It is impossible to be staved. With the pressure 250 kpa , Section air void still more than 60%, even on the tremendous pressure, always exist out water space, there are still 10-15% of the pore, and good resilience;

Average surface opening rate of plastic blind ditch reached 90-95%, much more higher than other similar products. To most effectively collecting soil of the seepage, and timely eduction;

plastic blind ditch made by filter membrane from Corrosion fiber and modified polyethylene 3 d mesh, never degradation in in the soil or water, try to be anti-aging formula, can Maintain permanent material without change

filter membrane of plastic blind ditch can be selected according to the different soil conditions, fully meet the needs of engineering, and avoid the old products filter membrane single faults.

plastic blind ditch is light, the construction and installation is very convenient, construction efficiency is greatly accelerated.

Type,specification,performance

Round blind ditch

MY60

MY80

MY100

MY120

MY150

MY200

Envelop dimensions(Wide × thick)mm

Φ60

Φ80

Φ100

Φ120

Φ150

Φ200

Hollow size(Wide × thick)mm

Φ25

Φ45

Φ55

Φ75

Φ80

Φ120

Unit length weigh(g/m)  (≥)

452

783

1025

1500

2000

3000

Air void(%)         (≥)

80

80

80

80

82

82

Compressive strength(Kpa)

Compression ratio 5%   (≥)

40

68

72

36

36

37

Compression ratio 10%  (≥)

82

123

132

73

72

70

Compression ratio 15%  (≥)

110

161

172

101

97

95

Compression ratio 20%  (≥)

147

197

222

129

118

116

performance indicators are up to national standards, some index higher than Japan, but the price is much lower than the products imported from Japan.

Application scope

1, highway, railway roadbed and road shoulder drainage; 

2, on the back of the retaining wall drainage (vertical, horizontal drainage);

3, tunnel, underground passage drainage;

4 the mountain slopes, dike slope`s surface slope drainage;

5, soft foundation treatment level drainage;

6, playground, golf course, airport, parks and other green drainage;

7, pile of coal field, landfill, composting etc. yard drain

8,

9, agricultural, horticultural of underground irrigation and drainage water system;

10, roof garden drainage.

 

The main technical indexes:

Type,specification,performance  

square blind ditch  

MF7030

MF7035

MF1030

MF1235

MF1435

MF1540

MF1550

MF3020

Envelop dimensions(Wide × thick)mm

70×30

70×35

100×30

120×35

140×35

150×40

150×50

300×20

Hollow size(Wide × thick)mm

45×10

50×12

70×10

40×10×2

50×12×2

55×20×2

55×25×2

150×70×3

Unit length weigh(g/m)(≥)

380

430

450

680

720

1000

1100

5600

Air void (%) (≥)

82

82

82

82

82

82

85

85

Compressive strength (Kpa)

Bepect ratio

5% (≥)

80

70

40

60

70

80

85

100

Bepect ratio

 10% (≥)

110

100

70

90

120

120

130

170

Bepect ratio

15% (≥)

170

160

110

130

160

170

180

260

Bepect ratio

20% (≥)

230

220

130

180

190

200

220

320

 



Plastic Blind Ditch

Circular Plastic Blind Ditch,Plastic Blind Ditch Drainage,Plastic Ditch Drainage,Water Drainage Ditch

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